Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.
The specific endpoint `/api/v1/payments/362` returned a live 402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns application/json. However, the crawled documentation pages (docs, api, pricing, README) all rendered only a "Connect wallet" prompt with no further technical detail, so the actual request/response schema for this particular endpoint is unknown.
Without documentation on what data or functionality this specific endpoint provides (the name "Premium API Access" is generic), it is difficult to determine its precise purpose. The platform's landing page lists categories like metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — but this endpoint path (`/payments/362`) does not match any of those listed routes. It may be a generic or dynamically-created payment endpoint. Agents should be aware that the actual payload format and response structure are undocumented.
Capabilities
Use cases
- —Programmatic pay-per-call API access without needing API keys or subscriptions
- —Agent-driven workflows that need low-cost, on-demand API calls settled in USDC on Base
- —Exploring x402 payment protocol integration with a live, inexpensive endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing keyless, pay-per-use API access on Base
- —Low-cost micropayment API consumption at $0.02/request
Not for
- —Users who need detailed API documentation or well-defined request/response schemas
- —Production workloads requiring guaranteed SLAs or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/payments/362 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint path doesn't match any of the listed API routes. The actual functionality behind 'Premium API Access' at /payments/362 is unknown.
Warnings
- —No documentation available — docs, api, pricing, and README pages all render only 'Connect wallet' with no content.
- —The endpoint path /api/v1/payments/362 does not match any of the advertised API routes on the landing page; its actual functionality is unclear.
- —No request or response schema is documented or inferable from the probe data.
- —The name 'Premium API Access' is generic and does not describe what the endpoint does.
Citations
- —The endpoint returns a live 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/payments/362
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimalshttps://lowpaymentfee.com/api/v1/payments/362